How to use the paconn._UPDATE function in paconn

# use default names
    if command_context is _DOWNLOAD:
        settings.api_properties = settings.api_properties or 'apiProperties.json'
        settings.api_definition = settings.api_definition or 'apiDefinition.swagger.json'
        settings.icon = settings.icon or 'icon.png'

    # Prompt for environment for any
    # operation other than `validate`
    if command_context is not _VALIDATE:
        prompt_for_environment(
            settings=settings,
            flow_rp=flow_rp)

    # Prompt for connector id for
    # operation `update` and `download`
    if command_context is _UPDATE or command_context is _DOWNLOAD:
        prompt_for_connector_id(
            settings=settings,
            powerapps_rp=powerapps_rp)

    return powerapps_rp, flow_rp

Loads the command table
    """
    def operation_group(name):
        return '{cli_name}.commands.{name}#{name}'.format(cli_name=__CLI_NAME__, name=name)

    with CommandGroup(self, _COMMAND_GROUP, operation_group(_LOGIN)) as command_group:
        command_group.command(_LOGIN, _LOGIN)

    with CommandGroup(self, _COMMAND_GROUP, operation_group(_DOWNLOAD)) as command_group:
        command_group.command(_DOWNLOAD, _DOWNLOAD)

    with CommandGroup(self, _COMMAND_GROUP, operation_group(_CREATE)) as command_group:
        command_group.command(_CREATE, _CREATE)

    with CommandGroup(self, _COMMAND_GROUP, operation_group(_UPDATE)) as command_group:
        command_group.command(_UPDATE, _UPDATE)

    with CommandGroup(self, _COMMAND_GROUP, operation_group(_VALIDATE)) as command_group:
        command_group.command(_VALIDATE, _VALIDATE)

SETTINGS,
            options_list=SETTINGS_OPTIONS,
            type=str,
            required=False,
            help=SETTINGS_HELP)
        arg_context.argument(
            'overwrite_settings',
            options_list=['--overwrite-settings', '-w'],
            type=bool,
            required=False,
            nargs='?',
            default=False,
            const=True,
            help='Overwrite the existing settings file.')

    with ArgumentsContext(self, _UPDATE) as arg_context:
        arg_context.argument(
            ENVIRONMENT,
            options_list=ENVIRONMENT_OPTIONS,
            type=str,
            required=False,
            help=ENVIRONMENT_HELP)
        arg_context.argument(
            API_PROPERTIES,
            options_list=API_PROPERTIES_OPTIONS,
            type=str,
            required=False,
            help=API_PROPERTIES_HELP)
        arg_context.argument(
            API_DEFINITION,
            options_list=API_DEFINITION_OPTIONS,
            type=str,

type: command
    short-summary: Downloads a given custom connector to the local directory.
    examples:
        - name: Download connector
          text: paconn download
"""

helps[_CREATE] = """
    type: command
    short-summary: Creates a new custom connector from the given directory.
    examples:
        - name: Create connector
          text: paconn create
"""

helps[_UPDATE] = """
    type: command
    short-summary: Update a given custom connector from the local directory.
    examples:
        - name: Update connector.
          text: paconn update
"""

helps[_VALIDATE] = """
    type: command

Update command.
    """
    # Get settings
    settings = SettingsBuilder.get_settings(
        environment=environment,
        settings_file=settings_file,
        api_properties=api_properties,
        api_definition=api_definition,
        icon=icon,
        connector_id=connector_id,
        powerapps_url=powerapps_url,
        powerapps_version=powerapps_version)

    powerapps_rp, _ = load_powerapps_and_flow_rp(
        settings=settings,
        command_context=_UPDATE)

    connector_id = upsert(
        powerapps_rp=powerapps_rp,
        settings=settings,
        client_secret=client_secret,
        is_update=True,
        overwrite_settings=False)

    display('{} updated successfully.'.format(connector_id))